40781304643 has 4 divisors (see below), whose sum is σ = 41025504240. Its totient is φ = 40537105048.

The previous prime is 40781304601. The next prime is 40781304653. The reversal of 40781304643 is 34640318704.

40781304643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40781304643 is a prime.

It is a super-2 number, since 2×40781304643² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40781304596 and 40781304605.

It is not an unprimeable number, because it can be changed into a prime (40781304653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122099548 + ... + 122099881.

It is an arithmetic number, because the mean of its divisors is an integer number (10256376060).

Almost surely, 2^40781304643 is an apocalyptic number.

40781304643 is a deficient number, since it is larger than the sum of its proper divisors (244199597).

40781304643 is a wasteful number, since it uses less digits than its factorization.

40781304643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244199596.

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 40781304643 in words is "forty billion, seven hundred eighty-one million, three hundred four thousand, six hundred forty-three".